Thus the only three valid candidates for these 3 cells are 5, 6 and 9. Thus the candidates 5, 6 and 9 must go in these three cells and nowhere else. Thesrefore you can eliminate these as candidates from all other cells in column 2.

Having done these eliminations, what is the only value that can go in r8c6?

Thus the only three valid candidates for these 3 cells are 5, 6 and 9. Thus the candidates 5, 6 and 9 must go in these three cells and nowhere else. Thesrefore you can eliminate these as candidates from all other cells in column 2.

Having done these eliminations, what is the only value that can go in r8c6?

Thanks for the explanation. Somehow i was distracted by the possibility that the 6 or 9 also could go anywhere else in this column. But it isn't. I prefer this method to find the answer rather than the whole solution. Because with the SteveF method i can learn the techniques step by step.